Shingle-sawing machine



2 Sheets-Sheet 2.

(No Model.)

J. L. DICKINSON. SHINGLE SAWING MACHINE.

Patented Apr. 21,1891.-

FlG 2 a I I I I n u I u l I I l r a I u r w PZQW/ JOSEPH L. DICKINSON,OF DUBUQUE, IOINA.

SHINGLE-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 450,995, dated April21. 1891.

Application filed March 9; 1889. Serial No. 302,643- (No model.)

To all whom it may concern:

Be it known that I, JOSEPH L. Dion INSON, a citizen of the UnitedStates, residing at Dubuque, in the county of Dubuque and State of Iowa,have invented certain new and useful Improvements in Shingle-SawingMachines; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to letters of referencemarked thereon, which form a part of this specification.

This invention pertains to certain new and useful improvements ofmachines for sawing shingles, having for its object the production ofmeans whereby a block of wood is fully utilized and thewaste material isreduced to a minimum,

The invention comprises an auxiliary carriage capable of being connectedto and operated with the main carriage and means for holding a reducedblock or spalt thereon and presenting the same to the action of the saw;and it also comprises the detail'construction, combination, andarrangement of parts, substantially as hereinafter fully set forth, andparticularly pointed out in the claims.

In the accompanying drawings, Figure l is a View in perspective of myimproved shingle-sawing machine, a reduced block or spalt being shown atS. Fig. 2 is a similar but enlarged view of a portion thereof, showingthe auxiliary carriage. Fig. 3 is a transverse sectional View on theline 00 00, Fig. 2. Fig. 4 is a view of the presser-block. Fig. 5 is aperspective view showing the under side of the auxiliary carriage andtilting table.

Referring to the drawings, A designates the frame of the machine, and athe horizontallydisposed circular saw, which is mounted and operated ina manner similar to those now in use.

B is the sliding carriage of ordinary construction, and it is providedwith end rods 1) 72, secured so as to slide on rods 1) or in grooves ofthe frame. This carriage has dogs 12 b for holding the block of wood tobe sawed, said bar resting upon the parallel bars 0 O, composing tiltingtable 0'. This tilting table is operated by cams B on a rod or shaft B(See Fig. 2.) The distance between the top of these bars or tiltingtable and the sawgages is the thickness of the shingle. The dogs I) Z)have their ends, which are preferably fiattened, secured in slots Z) ofrods 1), so that they can be secured close together or farther apart.The dog b is capable of being moved by ordinary links or arms 19 securedto a shaft b having a lever-handle 11 D is an auxiliary carriage, whichslides at its ends in grooved guides 61, rigidly secured to the frame Tadjacent to the side bars of tilting table 0. This carriage providesstops or supports to force the reduced block or spalt to the saw whenrequired-that is, after the block has been sawed to the full extentpossible by use of the main carriage and dogs. The auxiliary carriage Dis capable of being connected at will to the main carriage B by apivoted yoke d. A flat spring (1 attached to the under side of carriageD, bears against the lower reduced end of this yoke, which end isextended through a slot in the carriage D, whereby said yoke can be heldin engagementwith one of the end rods 1) of carriage B.

E is a stop or support held in place against one end of carriage -D byflat springs e, attached at their inner ends to the under side of saidcarriage, their outer ends being connected to said stop or support.These springs permit the stop or support to have a limited down wardmovement when the shingle-blocks of heavy wood are thrown thereon. Thereduced block or spalt rests against the stop or support, and in themovement of the carriages it is thereby forced against the saw, thespalt being held firmly on the side bars or ways of tilting table 0 by apresser-block g. An additional stop or support c is disposed at one sideof the carriage D, to which it is secured by a yielding bar 6 sothat theupper face thereof will be on a line with that of stop or support E.This stop or support 6' serves the same purpose as the other stop orsupport, and also as an additional hearing to prevent the spalt fromswinging out of place. It will be understood that these stops orsupports are intended for use when the reduced block or spalt is toothin to be held by the ordinary dogs.

F is a guide-bar having an inner projecting ribf, which forms a supportfor the butt of the shingle when passing beneath the saw, the inner endof said bar being extended under the saw, so as to serve as a supportand guide therefor.

To the right-hand or movable dog 19 is pivoted a flexible spring-arm G,to the outer end of which is attached apresser-block g, of rubber orserrated metal or other suitable material. This presser-block serves tohold the spalt as it passes to the saw and holds the shim (which is thethin remnant left after the spalt is sawed, being too thin for anothershingle or susceptible of being held by the dogs) on the saw and removesit when the carriage is drawn back. The presser-block g, when not inuse, can be thrown back out of the way by reason of its spring-ar1nbeing pivoted to the back of the dog I) or to the carriage, as seen inFig. 4.

In practice the block from which the shingles are to be made is placedon the side bars 0 of the tilting table 0' and held by the dogs in theusual manner during the sawing operation. l/Vhen, however, the block isso far reduced that a firm hold by the dogs cannot be had, it is placedagainst the stops or supports E 6', with the butt-end resting on the ribof and against the guide-bar F, and the presser-block is lowered down tothe spalt. When thus secured, the auxiliary carriage is connected to themain carriage by the yoke and is carried forward with said main carriageand the spalt presented to the action of the saw, and the shingle is cutand dropped from the under side thereof. The spalt is then drawn backwith the carriage and is again presented until too thin or unsuitable. v

It will be seen that by means of my invention a block of wood can beentirely used or consumed in the sawing of shingles, and thus all thewood is utilized and waste thereof is avoided. The parts by which thisis accomplished are extremely simple and do not in the least interferewith, but rather promote, the rapid use of the machine.

I claim as my invention 1. As an improvement in shingle-sawing machines,the auxiliary carriage herein described carrying spring-secured oryielding stops or supports for holding a reduced block or spalt foraction of the saw, as set forth.

2. As an improvement in shingle-sawing machines, the combination, withthe main sliding carriage, of the auxiliary carriage herein describedhaving a detachable connection with said main carriage and provided withyielding stops or supports and a presser-block for holding a reducedblock or spalt for action of the saw, as set forth.-

As an improvement in shingle-sawing machines, the combination, with themain sliding carriage, of the auxiliary carriage here in described, thestationary grooved guideways in which said carriage moves, and the yokepivotally secured to said auxiliary carriage and designed to engage saidmain carriage, substantially as set forth.

i. In a shingle-sawing machine, the combination, with the main slidingcarriage and the auxiliary carriage, of the shingle stops or supports atthe longitudinal edge and side of said auxiliary carriage and havingflexible connections therewith, substantially as set forth.

5. In a shingle-sawing machine, the combination, With the main slidingcarriage and the auxiliary carriage, of the shingle stop or support E,the springs secured thereto and to said carriage, the stop (2, and theyielding bar connected thereto and to said auxiliary carriage,substantially as set forth.

3. In a shingle-sawing machine, the combination, with the main slidingcarriage having end rods, of the auxiliary carriage, the pivoted yokesecured thereto so as to engage one of said end rods, and the springsecured to said auxiliary carriage holding said yoke in place,substantially as set forth. I

7. In a shingle-sawing machine, the combination, with the machine-frame,the horizontally-disposed saw, and the auxiliary carriage having theshingle stops or supports, of the guide-bar F, secured to said frame andprovided with a projecting rib forming a guide and support for the endof the shingle and having its forward end extended beneath said saw,substantially as and for the purpose set forth.

8. In a shingle-sawing machine, the combination, with the auxiliarycarriage, of the shingle-stops E 6', connected to said carriage, and thespring-held presser-block, constructed and arranged substantially as setforth.

In testimony whereofI affix my signature in presence of two witnesses. u

JOSEPH L. DICKINSON. Witnesses:

G. E. DAVIS, JAMES RAISTER.

ICC

